Hi!
Thank you for your screencast.
1. On the General Options -> Sources 2 panel, make sure nothing is selected: https://i.imgur.com/ZwPCyJT.png
2.
a. Not possible, but you can group them by categories: Results Grouping
b. That is possible, under the General Options -> Ordering panel: https://i.imgur.com/Gt9XnsW.png
3. You can exclude results under the Advanced Options -> Exclude Results panel: https://i.imgur.com/myMRNSE.png
4. I believe the titles are within your page contents, so it is actually part of the content. I don’t think there is a way of removing those, unless you remove them from the actual pages.
5. It is possible to use a custom field as the title. Check the primary title and content fields docuemtnation first. Basically, you could create a custom field for each page, and use that as the primary title field.
If you for example use the Yoast SEO plugin, you could use the ‘_yoast_seo_title’ custom field, that contains the custom title defined by the Yoast SEO plugin: https://i.imgur.com/IN24hzI.png
I hope this helps.